Liquid nitrogen to get rid of corns a few days to fall off depends on the patient’s specific situation, individual differences are very large, from a few days to a few weeks, there is no clear data to support. The principle of liquid nitrogen to get rid of corns is through the extremely low temperature of liquid nitrogen, after contact with the skin, can cause local tissue necrosis, scabs, shedding, so as to achieve the purpose of treatment of corns. After treatment, it can usually fall off after a few days to weeks, if the scabs can not fall off also need to go to the hospital, if there is still no response after 1 to 2 weeks of treatment, it may be necessary to continue the treatment. After liquid nitrogen freezing, small localized blisters and blood blisters may appear, which need to be protected to avoid the occurrence of secondary infection. If there is a rupture of blisters, etc., attention should be paid to the protection of the wound, you can follow the doctor’s instructions to properly apply iodized povidone, etc., to avoid the occurrence of secondary infection. Liquid nitrogen corns patients, it is recommended to go to a regular hospital, consult a professional doctor, improve the relevant examination, to avoid blind treatment.